Multicolor pencil



P 3, 1938. HERSINHOD 2,130,011

MULTICOLOR PENCIL Filed Jan. 22', 1936 a I! a Patented Sept. 13, 1938 UNITED STATES PATENT OFFICE Application January 22, 1936, Serial No. 60,244

Germany February 6, 1935 8 Claims. (01. -83)- Multi-color pencils are known which often have a very complicated mechanism and are consequently very expensive. In other multi-color pencils the leads are embedded in wood so that a portion of the lead is wasted through sharpening.

All these facts add to the cost of the pencils and besides it often happens that the device for actuating the individual leads very often fails to act after some time of use as its springs become fatigued and its shifting device becomes worn.

The invention relates to a multi-color-pencil in which the individual leads of different colors and sizes are arranged concentrically in such a manner that the leads of smaller diameter are shiftably mounted in leads of different color and larger diameter. This arrangement of the leads is possible owing to the fact that the leads of larger diameter have alongitudinal bore in which the leads of smaller diameter are movably fitted. Thus the leads of smaller diameter are surrounded by the leads of larger diameter.

The inner smaller leads project slightly from the outer leads. If the inner leads are pushed inwards they disappear in the outer larger leads. It is thus possible to write, draw, sketch or the like with the outer lead.

Several embodiments of the invention are illustrated by way of example in the accompanying drawing in which:-

Fig. 1 shows a pencil in longitudinal section in which a divided inner lead is surrounded by two tubular outer leads.

Fig. 2 is a cross-section through Fig. 1.

Fig. 3 is a longitudinal section showing an element for producing friction inserted between an inner undivided lead and an outer tubular lead.

Fig. 4 shows in end elevation another form of construction wherein the leads are diametrically subdivided in the direction of their length.

Fig. 5 is an end view showing a modification of the outer tube of the construction shown in Fig. 4.

Fig. 6 shows in end elevation a modified form of construction wherein the leads are of polygonal cross section and longitudinally divided.

In Fig. 1 of the drawing a and a designate two inner solid leads of different colors. These two leads a and a are slidable in the bore of two intermediate leads N, b of larger diameter.

- and these leads N, b" are slidably accommodated in the bore of an outer lead c of still larger diameter. The outer surfaces of the inner leads a a, the outer surfaces and bores of the intermediate leads 13 and b and the bore of the lead 0 may be roughened or fluted and coated with a frictional adhesive to hold the leads sumciently firmly in the bores to prevent them falling out.

Fig. 3 shows a pencil in which a iriction-producing element (1 is inserted between an undivided inner lead a and a tubular outer lead b.

Fig. 4 shows a pencil in which the tubular leads surrounding an inner lead a which may be subdivided as inFig. 1, or undivided as in Fig. 3, are divided in longitudinal direction. The inner tubular lead is subdivided into two semi-cylinders b and b and the outer lead is subdivided into two semi-cylinders c and c surrounded by a tubular outer member The member I may be modified to prevent rolling of the pencil and such a modification is illustrated in Fig. 5 where a tube h is equipped with at least one fiat longitudinal surface, two surfaces a being shown by way of example.

The same object is attained by making the pencil with a polygonal cross-section, and Fig. 6 shows a pencil of square cross-section, with a divided or undivided inner lead a and longitudinally subdivided hollow leads b b and c c of rectangular V section, in a tube I of square cross-section.

It is already known to fit leads of smaller diameter in leads of larger diameter, but in the known pencils the leads are rigidly interconnected so that it is not possible to move or shift the inner lead in the surrounding lead as in the pencil according to the invention.

I claim:

1. A multi-color-pencil comprising in combination at least one solid inner lead, and at least one outer lead of larger diameter than said inner lead and having a longitudinal bore, said solid inner lead being axially slidable in the bore of said outer lead.

2. A muiti-color-pencil as specified in claim 1. in which the surface of the inner lead and the bore of the outer lead are roughened.

3. A multi-color-pencil as specified "in claim 1. in which the outer surface of the inner lead and the bore of the outer lead are fluted.

4. A'multi-color-pencil as specified in claim 1, in which the outer surface of the'inner lead and the bore of the outer lead are coated with a frictional adhesive substance.

5. A multi-color-pencil as specified in claim 1, in which the leads are of different colors.

8. A multi-color-pencil as specified in claim 1, in which the leads are divided in longitudinal direction.

7. A multi-color-pencil as specified in claim 1,

longitudinal surface.

ILIE HERSINHOD. 

